Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
For consumer products, the first step with Microsoft support is always the support chat which you can access via https://support.microsoft.com/contactus . (Note that it may not be available 24 hours a day.) At a later stage, you may be able to get a callback.
Alternatively, you can ask your question here in the Q&A forum. Someone may be able to point you in the right direction.